Monmouthshire Houses: A Study of Building Techniques and Smaller House-Plans in the Fifteenth to Seventeenth Centuries is a study of buildings within the county of Monmouthshire written by Sir Cyril Fox and Lord Raglan and published by the National Museum of Wales. The study was published in three volumes; Part I Medieval Houses, Part II Sub-Medieval Houses, c. 1550–1610 and Part III Renaissance Houses, c. 1590–1714, between 1951 and 1954. The series was republished by Merton Priory Press in 1994. A later historian of Welsh architecture has described the work as equal in importance, in its own field, to Charles Darwin's On the Origin of Species.